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      Permanent link:
      https://www.ias.ac.in/article/fulltext/seca/015/06/0417-0423

    • Keywords

       

      Ferric Chloride; Potassium Permanganate; Hydriodic Acid; Anhydrous Aluminium Chloride; Alcoholic Ferric Chloride

    • Abstract

       

      Pongamol, which is the second important crystalline component of the pongamia oil, has the molecular formula C18H14O4 and contains a methoxyl group. It has also a phenolic or enolic hydroxyl group. Demethylation with aluminium chloride yields nor-pongamol whereas treatment with hydriodic acid gives rise to a product which is probably isomeric but does not possess phenolic properties. Treatment with bromine produces a tetrabromo derivative which on boiling with acetone yields a tribromo compound. Oxidation with potassium permanganate or decomposition with alkali yields benzoic acid. From these properties and from colour reactions it is suggested that pongamol is a flavone derivative containing a hydroxyl, a methoxyl and an ethylene double bond.

    • Author Affiliations

       

      S Rangaswami1 T R Seshadri1

      1. Departments of Chemistry, and Chemical Technology, Andhra University, Waltair
    • Dates

       
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